Automatic and on-line method for weighing and measuring thickness of plate glass

The invention discloses an automatic and on-line method for weighing and measuring thickness of plate glass. The automatic and on-line method comprises the following steps of arranging a parallel beamweighing sensor between a glass split table support rack and a glass split table; arranging three upper measurement air cylinders, and connecting the three upper measurement air cylinders to an upperdisplacement sensor; arranging three lower measurement air cylinders, and connecting the three lower measurement air cylinders to a lower displacement sensor; controlling a glass split table supportair cylinder to ascend by a glass production line PLC when glass runs at the glass split table so that the glass is raised from a transmission roller; sending acquired weight data to the glass production line PLC by the parallel beam weighing sensor, subtracting weight of the split table from the weight data to obtain glass weight by the glass production line PLC; and controlling the three upper measurement air cylinders to